Physics – Condensed Matter – Superconductivity
Scientific paper
2010-09-11
Phys. Rev. B83:174509,2011
Physics
Condensed Matter
Superconductivity
19 pages, v.2: various additions, v.3: journal version (minor improvements in presentation)
Scientific paper
10.1103/PhysRevB.83.174509
In contrast to single-component superconductors, which are described at the level of Ginzburg-Landau theory by a single parameter \kappa and are divided in type-I \kappa<1/\sqrt{2} and type-II \kappa>1/\sqrt{2} classes, two-component systems in general possess three fundamental length scales and have been shown to possess a separate "type-1.5" superconducting state. In that state, as a consequence of the extra fundamental length scale, vortices attract one another at long range but repel at shorter ranges, and therefore should form clusters in low magnetic fields. In this work we investigate the appearance of type-1.5 superconductivity and the interpretation of the fundamental length scales in the case of two bands with substantial interband couplings such as intrinsic Josephson coupling, mixed gradient coupling and density-density interactions. We show that in the presence of substantial intercomponent interactions of the above types the system supports type-1.5 superconductivity with fundamental length scales being associated with the mass of the gauge field and two masses of normal modes represented by mixed combinations of the density fields.
Babaev Egor
Carlstrom Johan
Speight Martin
No associations
LandOfFree
Type-1.5 superconductivity in multiband systems: the effects of interband couplings does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Type-1.5 superconductivity in multiband systems: the effects of interband couplings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Type-1.5 superconductivity in multiband systems: the effects of interband couplings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-562944